<!DOCTYPE html>
<html>

	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>

	<body>
		<script type="text/javascript">
			function hallo(a, b) {
				str = a + '你好';
				b(str);
			};

			hallo('郭瑞阳说', function(a) {
				console.log(a);
			});
		</script>
	</body>

</html>